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Ichnogenera belonging to cleft-foot and wedge-foot bivalves can in most cases be distinguished. This paper addresses the taxonomy of locomotion traces made by wedge-foot bivalves. Ichnogenera Ptychoplasma Fenton and Fenton and Oravaichnium Plička and Uhrová are reviewed together with related ichnotaxa. Both are interpreted as the locomotion traces of non-cleft, wedge-foot bivalves. Both are usually...
Tiering patterns of trace fossils in flysch deposits are diversified. They are controlled mainly by the degree ofoxygenation of the sediment and the sedimentation rate. With respect to depth of burrowing, multi- and singlelayer colonizers of newly deposited turbidite layers are distinguished. The multi-layer colonizers begin to colonize the newly deposited turbidite layer from the deepest tiers.
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